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A multi-laser beam multi-velocity cross-section radar feedforward control method for wind turbines

A wind turbine and lidar technology, which is applied in the control of wind turbines, the combination of wind turbines, the monitoring of wind turbines, etc., can solve the problem of affecting the effect of feedforward control, reducing the effective wind speed frequency range of lidar, and adaptive low-pass. The filter cut-off frequency parameter is too small and other problems

Active Publication Date: 2020-09-11
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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Problems solved by technology

The value of the cutoff frequency parameter of the adaptive low-pass filter obtained by this method is too small, resulting in a smaller effective wind speed frequency range of the lidar used for feedforward control, which also affects the effect of feedforward control

Method used

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  • A multi-laser beam multi-velocity cross-section radar feedforward control method for wind turbines
  • A multi-laser beam multi-velocity cross-section radar feedforward control method for wind turbines
  • A multi-laser beam multi-velocity cross-section radar feedforward control method for wind turbines

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with specific examples.

[0046] Such as figure 1 As shown, the multi-laser beam multi-velocity cross-section radar feed-forward control method of the wind power generating set provided in this embodiment, firstly, the pulsed laser radar is used to provide 4 laser beams, and the laser radar is installed in the axial direction of the impeller of the wind generating set The distance between the position and the velocity measurement section is within the range of 50 meters to 200 meters, and a maximum of 10 wind speed measurement distances can be set arbitrarily. Among them, the distances from the laser radar velocity measurement section in the axial direction of the impeller to the laser radar installation position are: x 1 、x 2 、x 3 ...x i , i is the actual number of velocity measuring sections used for feedforward control, the maximum value is 10, x 1 It is the distance from the nearest speed measu...

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Abstract

The invention discloses a feed-forward control method of a wind generating set multi-laser beam multi-speed measurement section radar. According to the feed-forward control method, a pulse laser radaris adopted to provide a plurality of laser beams, the distance between the installation position of the laser radar and a speed measurement section in the axial direction of an impeller of a wind generating set is within 50-200 meters, and at most 10 wind speed measurement distances are set at will; and the number of the speed measurement distances and the corresponding speed measurement positions are determined, and thus, a multi-laser beam multi-speed measurement section radar feed-forward control wind speed measurement framework is formed, and then the multi-laser beam multi-speed measurement section radar feed-forward control wind speed measurement framework is controlled to achieve multi-laser beam multi-speed measurement section radar feed-forward control. By means of the feed-forward control method, the action of a variable-pitch actuating mechanism can be effectively reduced, the running reliability of the wind generating set is improved, the fluctuation range of the rotatingspeed of a generator is greatly reduced, and the My bending moment load at the bottom of a tower barrel is reduced.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a multi-laser beam multi-velocity section radar feed-forward control method for a wind power generating set. Background technique [0002] It is known in the industry that for wind turbines operating above the rated wind speed, the external force—the wind speed contains low-frequency signals with relatively high energy. Under the action of low-frequency wind speed, the wind turbine running in the grid-connected power generation mode includes the generator speed signal, the bending moment signal in the front and rear direction of the tower, the bending moment signal of the hub, the torque signal at the low-speed end of the gearbox, the bending moment signal in the blade waving direction, Blade pitch angle signals, etc., present large low-frequency energy similar to wind speed. If the laser radar is used to introduce the measured value of the low-frequency front wind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00F03D17/00F03D9/25
CPCF03D7/00F03D9/25F03D17/00F05B2270/32Y02E10/72
Inventor 王明江黄国燕
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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